The Muscle System allows moving by contracting and releasing it self as what happens when you flex. Our Nervous system controls the muscle system even though some muscles like cardiac muscle move completely automatically. There are three distinct types of muscles: skeletal muscles, cardiac or heart muscles, and smooth (non-striated) muscles. Muscles provide strength, balance, posture, movement and heat for the body to keep warm.The Skeletal System is of both fused and separate bones connected and supported by ligaments, tendons, muscles, and cartilage. The skeletal system protects, supports, and helps organs; examples of the organs that it supports are the heart, brain, and lungs. The average adult has 206 bones and these bones are connected by joints, which allow us to move and are fairly moveable. There are four different types of bone they are long bones, short bones, flat bones, irregular bones, and sesamoid bones. The two systems that I choose for this assignment are the Muscle System and the Skeletal System. Both systems depend on each other for many reason s and this will explain/name some of them. This will also explain how they are severely important to us and our bodies. In addition it will show differences and similarities.The third function of the muscular system is pumping blood. The cardiac muscles in our body control the pumping of blood throughout arteries and veins. The contraction of the heart muscle is involuntary and is controlled by the hearts own electrical system. The right side of the heart receives blood from the body and pumps it to the lungs. The left side of the heart receives blood from the lungs and pumps it out to the body (Shier, Butler, Lewis, 2009). The fourth function of the muscular system is aiding digestion. The smooth muscles in the stomach and intestines work to process or digest food. The involuntary contractions in the stomach and intestines help move the food along the digestive tract and direct indigestible contents to the rectum (p.189). The fifth and last function of the muscular system is ensuring blood flow throughout the body. Smooth muscles in the arteries contract to push blood through the vessel systems of the body. Ultimately pushing the blood from the arterioles into the capillaries to return back to the heart (p.189). The muscular system also plays an important role in homeostasis. Homeostasis refers to the process of keeping the internal body environment in a steady or stable state when the external conditions change. The muscular system helps maintain homeostasis by constantly regulating body temperature. For example, when muscles contract they cause vasoconstriction. This allows less heat to be carried from the core to the surface of the body, maintaining core temperature. In this scenario extremities may turn blue and feel cold and can even be damaged (p.186). The muscular system also plays an important role in our daily life and taking care of it is crucial. A healthy diet is highly recommended especially since many muscles are involuntary and will not benefit from physical exercise. Exercising skeletal muscles helps develop strength and increases volume, elasticity and contractility. Exercising also helps in holding up better to fatigue. Maintaining a healthy and active lifestyle will help the body as it ages. As the body ages, the size and power of all muscle tissue decreases. Skeletal muscles become less elastic and the tolerance for physical exercise decreases. Also, the body’s ability to recover from muscular injuries decreases, restricting mobility as one ages. Besides the obstacles that the body faces as it ages at times it must deal with a muscular degenerative disease such as muscular dystrophy (Martini, 2000).